ezk-sip-ua

Incomplete low level SIP user agent utilities.

• Create/remove bindings via REGISTER
• Create and tear down INVITE sessions
• 100rel and timer extensions built in

Following RFCs were used:

• RFC3261 - SIP: Session Initiation Protocol
• RFC3262 - Reliability of Provisional Responses in SIP
• RFC4028 - Session Timers in SIP